CountLines.java

import java.io.BufferedReader;
import java.io.InputStreamReader;


public class CountLines {

  public static void main(String[] args) {
		Process p;
		try {
			p = Runtime.getRuntime().exec("wc -l " + args[0]);
			p.waitFor();
			BufferedReader b = new BufferedReader(new InputStreamReader(p.getInputStream()));
			String line = b.readLine();
			int lineCount = Integer.parseInt(line.split(" ")[0]);
	    System.out.println(lineCount);;
		} catch (Exception e) {
			e.printStackTrace();
		}

	}
	
}